docs: def Corripio_motor_efficiency(P):
      r'''Estimates motor efficiency using the method in Corripio (1982)
      as shown in [1]_ and originally in [2]_. Estimation only.
  
      .. math::
          \eta_M = 0.8  + 0.0319\ln(P_B) - 0.00182\ln(P_B)^2
  
      Parameters
      ----------
      P : float
          Power, [W]
  
      Returns
      -------
      efficiency : float
          Motor efficiency, [-]
  
      Notes
      -----
      Example 16.5 in [1]_.
  
      Examples
      --------
      >>> Corripio_motor_efficiency(137*745.7)
      0.9128920875679222
  
      References
      ----------
      .. [1] Seider, Warren D., J. D. Seader, and Daniel R. Lewin. Product and
         Process Design Principles: Synthesis, Analysis, and Evaluation.
         2 edition. New York: Wiley, 2003.
      .. [2] Corripio, A.B., K.S. Chrien, and L.B. Evans, "Estimate Costs of
         Centrifugal Pumps and Electric Motors," Chem. Eng., 89, 115-118,
         February 22 (1982).
      '''
      P = P/745.69987
      logP = log(P)
      return 0.8 + 0.0319*logP - 0.00182*logP*logP